Abstract: Since nonuniformity of IR imaging system seriously limits its working performances, we have done some research on measuring nonuniformity of RI image to improve its image quality. This article proposes a method in measuring nonuniformity of Group 1 IR Imaging System based on the practical measurement. By analyzing the result we can conclude that nonuniformity of Group 1 IR Imaging System limits its working performances at the level of about 5 percent. !6
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